HMS Sea Rover sinks a Japanese vessel with gunfire off Surabaya, Java, Netherlands East Indies.

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Boats In Class

S Group 3 Specification

Length overall

217'

Beam

23' 6"

Depth

11'

Diving Depth

350'

Speed

Surface 15 knots (design)

Surface 14.75 knots (service)

Submerged 10 knots (design)

Submerged 9 knots (service)

No. of shafts

2

Endurance

Surface: 6000 miles at 10 knots (design)

Armament (i)

6 21" bow tubes

1 21" stern tube

(13 torpedoes carried)

1 3" gun

3 0.303" machine-guns

1 20mm Oerlikon cannon

Complement

48

Note

The armament of submarines of this class varied considerably. For example: 23 boats were fitted with the six bow tubes only; 18 vessels, intended to operate in the Far East, had their 3" guns replaced by 4" guns; whilst, in some boats, the Oerlikon cannon replaced, rather than supplemented, the three machine-guns.